Study | Year | Representativeness of the exposed cohort | Selection of the non-exposed cohort | Ascertainment of exposure | Demonstration of the absence of outcome of interest at the start of the study | Comparability (control for important factors) (maximum two stars) | Assessment of outcome | Follow-up adequate for outcomes | Adequacy of follow up | Total score |
Tzamalis et al. 2020 | 2020 | * | * | * | * | ** | * | * | * | 9 |